New process for micro electric field reinforced low-carbon nitrogen removal

Abstract

The invention provides a new process for micro electric field reinforced low-carbon nitrogen removal, which is particularly suitable for treating waste water with high ammonia nitrogen content and high organic substance content. The process comprises anaerobic fermentation reaction and autotrophic synchronous nitrification-denitrification reaction, wherein after the waste water to be treated enters an anaerobic fermentation reactor and is subjected to anaerobic fermentation reaction treatment, most of organic substances are converted into methane through anaerobic fermentation to perform energy recycle and avoid directly converting the organic substances into CO2 to be discharged. The waste water after the anaerobic treatment has few organic substances and then enters a complex three-dimensional electrode-biological membrane reactor. The process realizes autotrophic synchronous nitrification-denitrification by domesticating carbon autotrophic nitrifying bacteria and hydrogen autotrophic denitrifying bacteria attached to particle electrodes in the complex three-dimensional electrode-biological membrane reactor, finally fulfills the nitrogen removal purpose of directly converting the ammonia nitrogen into the nitrogen, does not need to add the organic substances, basically has no CO2 emission, and is a controllable, efficient, low-consumption, 'low-carbon emission' and environment-friendly new process.

Description

technical field [0001] The invention relates to the field of waste water treatment technology, in particular to a new low-carbon high-efficiency green denitrification technology enhanced by a micro-electric field, which is especially suitable for the treatment of waste water with high ammonia nitrogen and high organic content. Background technique [0002] The traditional aerobic-anaerobic biological nitrogen removal process arranges nitrification and denitrification as two independent stages in different reactors (in space) or uses intermittent aerobic and anaerobic conditions (in time) to achieve nitrogen Therefore, the denitrification system is often complicated, the energy consumption is large, and a large amount of CO needs to be emitted while denitrification 2 . With the advent of the low-carbon era, CO 2 It has become a kind of pollutant, so experts and scholars at home and abroad urgently need to find a low-consumption, high-efficiency and CO 2 A new denitrificati...

AI Technical Summary

Problems solved by technology

While improving the efficiency of nitrification and denitrification, it is also necessary to consider the dynamic balance of the two processes, which greatly increases the difficulty of regulating the effect of SND in actual engineering, resulting in the low denitrification efficiency of SND in most applications. Generally, it is only about 10% to 20%, which is the main reason why the SND denitrification function cannot be widely applied despite its superior performance.

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